The equation is .
Solve by algebraically.
\ (Subtract 22 from each side)
(Simplify)
(Divide each side by 2)
(Divide:
) \ \
The solution is
.
Solve by graphing.
\The equation is .
The related function is .
To graph the function make a table
\Draw a table
\ \
x \ | \
\
f(x) = 2x +22 \ | \
\
f(x) \ | \
\
(x, f(x)) \ | \
\
| \
\
= 2( | \
\
4 \ \ \ | \
\
( | \
\
| \
\
= 2( | \
\
2 \ | \
\
( | \
Use these ordered pairs to graph the equation.
\1. Draw a coordinate plane.
\2. Plot the points.
\3. Draw a line through these points.
\The graph intersects the x-axis at , hence the solution is
.
The root of the equation is
.